Information recording/reproducing apparatus

Details Information recording/reproducing apparatus Information recording/reproducing apparatus

1991-09-24

1993-09-21

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4427, G11B 700

Patent

active

052475042

ABSTRACT:
An information recording/reproducing apparatus having two light sources, one of which is for use in recording information and the other one of which is for use in reproducing information, in which during action when information is recorded on an information recording medium in the apparatus, tracking errors of light beams emitted from the two light sources are corrected with the aid of a tracking error signal detected from reflection light beams of light beams emitted from a light source for use in recording information. Therefore, the light beams spot of the light beam for use in recording information can be positioned at a center portion of a data track without regard to a relative positional relation between the light beam for recording information and the light beam for reproducing information.

REFERENCES:
patent: 4730293 (1988-03-01), Pierce et al.
patent: 4787076 (1988-11-01), Oeguchi et al.
patent: 5033040 (1991-07-01), Fujita
T. Ishida, et al, "High Speed Optical Card Reader/Writer using Two Optical Sources," Central R&D Lab., EFTS Division, Omron Tateisi Electronics Co., pp. 4-265, 1989.

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